Quote:
Originally Posted by dkozloski  If the vehicle has been sitting for some length of time the TPMS defaults to updating once/hr to save the battery life. After you start driving again the system starts reporting more often after you get up to 20MPH. If you stop the system still updates at the increased rate until after it has been sitting for a while, then the rate drops back to battery save mode. |
In my '07 Escalade, it seems to update immediately when I fill my tires. I usually check my tires on Saturday morning, cold, in the garage after sitting all night. How? I check them from my 2-way remote from inside my home (cool feature). When low, I go out and fill. I check the fill with a tire gauge and when done I use my remote, again, to do a second check and it's up to the new pressure. This works on every tire so I cannot believe that there is a one hour (or even one minute) update rate that's fixed.
I'd think that they'd update more often if the pressure is changing, but that's just a thought. And another thought is that if I ASK for the pressure, it updates, immediately (the auto-update is useful for telling us when a tire has lost pressure, but if I ask for the pressures, I suspect it could query the sensors right then). Again, just speculation.
